Someone once asked...
Someone answered with kindness...
In the most literal, biological sense? To reproduce and try to give your offspring the tools to reproduce. We are just a bunch of genes trying to make copies of themselves. In the philosophical sense? To find and chase the things that brings us joy while trying to not reduce anyone else's. It can be something as simple as enjoying a warm piece of freshly baked bread or as grandiose as pursuing a scientific breakthrough for the betterment of humanity. The hardest part is both finding those joys and realizing you already found them.
Another soul answered...
I think this question is somehow a fallacy. It proposes: - That life has meaning: No, it doesn't, life doesn't need meaning, meaning is a concept we create and try to impose on top of reality. - That the meaning of life is singular: nop, meaning varies from person to person and even the same person in their lifetime.